Distribution and Habitat
A. senex is known from only three localities in Costa Rica, one in the Volcán Barva region and two on the extreme northern slopes of the Cordillera de Talamanca. It is found associated with streams in high premontane rainforest and lower montane wet forest and rainforest, from 1,280 - 2,040 m in elevation (Savage, 2002).
- Savage, J. M. (2002). The Amphibians and Reptiles of Costa Rica. University of Chicago Press, Chicago and London.
- Taylor, E.H. (1952). "A review of the frogs and toads of Costa Rica." University of Kansas Science Bulletin, 35, 577-942.